CN1379704A - Tool for rotary chip removal, tool tip and method for manufacturing tool tip - Google Patents

Tool for rotary chip removal, tool tip and method for manufacturing tool tip Download PDF

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Publication number
CN1379704A
CN1379704A CN00814227A CN00814227A CN1379704A CN 1379704 A CN1379704 A CN 1379704A CN 00814227 A CN00814227 A CN 00814227A CN 00814227 A CN00814227 A CN 00814227A CN 1379704 A CN1379704 A CN 1379704A
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CN
China
Prior art keywords
cutter head
cutter
hole
cutting edge
mould
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Granted
Application number
CN00814227A
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Chinese (zh)
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CN1315608C (en
Inventor
约翰尼·布鲁恩
马蒂亚斯·普伊德
米卡埃尔·格伦奎斯特
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Seco Tools AB
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Seco Tools AB
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Publication of CN1379704A publication Critical patent/CN1379704A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0002—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
    • B23B51/0003—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0002—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
    • B23B51/0003—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts
    • B23B51/0004—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts with cutting heads or inserts attached by screw means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/28—Details of hard metal, i.e. cemented carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/32—Details of high speed steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/84—Steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2224/00—Materials of tools or workpieces composed of a compound including a metal
    • B23B2224/04—Aluminium oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2224/00—Materials of tools or workpieces composed of a compound including a metal
    • B23B2224/32—Titanium carbide nitride (TiCN)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2224/00—Materials of tools or workpieces composed of a compound including a metal
    • B23B2224/36—Titanium nitride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/12—Boron nitride
    • B23B2226/125—Boron nitride cubic [CBN]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/31—Diamond
    • B23B2226/315—Diamond polycrystalline [PCD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/10—Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/02—Connections between shanks and removable cutting heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/14—Configuration of the cutting part, i.e. the main cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/50—Drilling tools comprising cutting inserts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S408/00—Cutting by use of rotating axially moving tool
    • Y10S408/713—Tool having detachable cutting edge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/78—Tool of specific diverse material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9098—Having peripherally spaced cutting edges with means to retain Tool to support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9098—Having peripherally spaced cutting edges with means to retain Tool to support
    • Y10T408/90993—Screw driven means

Abstract

The present invention relates to a tool and a tool tip for chip removal, wherein the tool in operative position preferably rotates around its longitudinal centre axis. The invention also relates to a method for manufacturing a tool tip. The tool tip (10') contains two hard metal grades, a tough less wear resistant grade in the inner portion (40') and a more brittle more wear resistant grade in the external portion (41'). The tool tip is made by injection moulding and the two grades have the same shrinkage. The inner portion (40') is entirely surrounded by the external portion (41') except for in the feed direction and the retraction direction. The tool tip has a thread (25) formed in the tougher hard metal such to endure high tensions.

Description

Rotary cutting tool, cutter head and the method for making cutter head
Background of invention
The present invention relates to a kind of rotary cutting tool, it comprises a cutter hub, cutter head and fastener.The invention still further relates to a kind of cutter head, and relate to a kind of method that is used to make cutter head.
Prior art
Knew in the past, used removable cutting edge at the dissimilar cutter that is used for machining.But, when relating to when being used for the milling cutter that rotates around its longitudinal axis and drilling tool, because cutting edge need bear transformable cutting speed, thereby because the intensity aspect, this technology has its practical limitation.
U.S. Patent No. 5,947,660 have disclosed a kind of drilling tool, and this drilling tool has one and is anchored at the detachable cutter head that passes through injection mo(u)lding on the cutter hub by a handle bar.Shortcoming as the known drilling tool of using drilling tool always is that it is not suitable for transformable cutting speed.In addition, the screw thread in the known drilling tool tends in heavily stressed fracture down.
For example, by WO 98/28455 extrusion forming core body and a parcel pipe of making by dusty material in two steps as can be known.Described dusty material is made of tungsten carbide (WC) and cobalt (Co), described dusty material is compressed and is sintered subsequently between a pressure head and a mould, the carbide alloy so that can melt and bond in the cementing metal, thus be formed for the cutter material of machining.The purpose of known technology is to obtain two kinds of different characteristics according to the radial position of solid.The defective of this technology is, can produce fracture or can produce shrinkage cavity in the inner radial part in the radially outer part.
Summary of the invention
Therefore, one object of the present invention is to provide a kind of the have milling cutter of replaceable cutting edge or the embodiment of drilling tool, and described embodiment can eliminate the existing problem of cutter of the prior art.
Another object of the present invention is to provide a kind of rigid blade arbor, and it preferably is used for boring or milling, in this cutter, compares with the inner radial of cutting edge, and the radially outer that bear the cutting edge of higher cutting speed should have better wear resistance.
Another object of the present invention is to provide a kind of cutter, and it preferably is used for boring or milling, in this cutter, compares with the radially outer of cutting edge, and the inner radial that bear the cutting edge of low cutting speed should have high toughness.
Another object of the present invention is to provide a kind of cutter, and it preferably is used for boring or milling, in this cutter, has reduced the danger of cutter head fracture.
Another object of the present invention is to provide a kind of cutter head, and it has can bear heavily stressed screw thread.
Another object of the present invention is to provide a kind of method that is used for being made by the injection moulding carbide alloy cutter head, thereby can not limit the free degree of geometry basically, and has therefore simplified grinding.
Another object of the present invention is to provide a kind of method that is used for being made by the injection moulding carbide alloy cutter head, avoids rupturing and the formation of hole by this method.
With reference to accompanying drawing, these and other objects of the present invention are to realize by cutter, cutter head and method that claim limits.
Accompanying drawing is briefly described
Fig. 1 has shown a kind of drilling tool of the present invention with the part section form.
Fig. 2 has shown a kind of cutter head of the present invention with the side view form.
Fig. 3 has shown cutter head of the present invention with opposite side view form.
Fig. 4 has shown described cutter head with the bottom view form.
Fig. 5 has shown along the section of Fig. 3 center line V-V.
Fig. 6 shown cutter head among the present invention another embodiment with Fig. 5 in similar section.
Fig. 7 shown cutter head among the present invention another embodiment with Fig. 5 in similar section.
Fig. 8 has shown a drill body of the present invention with the side view form.
Fig. 9 has shown described drill body with the top view form.
Figure 10 has shown an end of described drill body with the enlarged side view form.
Figure 11 has shown a kind of device that is used to make cutter head of the present invention with the bottom view form.
Figure 12 has shown along the section of Figure 11 center line XII-XII.
Figure 13 with corresponding to the form of the section of Figure 11, shown the device in second manufacturing step.
Figure 14 with along the form of the section of Figure 13 center line XIV-XIV, shown the device in second manufacturing step.
Figure 15 has shown another embodiment of cutter end among the present invention with the form of decomposition view.
Detailed description of the present invention
Cutter of the present invention embodiment illustrated in fig. 1 is a kind of auger, and in this case, this auger comprises 50, springs 51 of 12, one lock-screws of 11, one cutter hubs of 10, handle bars of a cutter head and a limit screw 52.By this cutter, although cutter hub is fixed in the rig, it also can unclamp to change described cutter head.At U.S. Patent application No.5,947,660 and european patent application No.96913765.2 in also disclosed this drilling tool, so these documents can be used in combination at the application's specification.
Cutter head 10 is provided with at least one cutting edge 19 in the end away from drilling tool body 12, this cutting edge is to go out according to the area design of using.Therefore, when being face cutter, described cutting edge is straight basically and is parallel to vertical central axial line of cutting tip, and when being the pommel face cutter, cutting edge then is circular.The front end of cutting tip 10 in the accompanying drawings has a cutting edge that is used to hole 19, and this cutting edge comprises a chisel edge 24.
Cutter head 10 comprises bearing-surface 22 consistent with WO 9900208 A1 and front surface 14 with cutter hub 12, and document WO 9900208 A1 can be used in combination in the application's explanation.
Cutter head 10 is made by the injection moulding carbide alloy.Shown in Fig. 2-4, described cutter head comprises 15, one bearing-surfaces 22 of two top clearance surfaces and the first surface 17 and second curved surface 18 that link to each other.All these faces are all made by the injection moulding carbide alloy with the sword that links to each other.Intersection line between second curved surface or chip pocket 18 and clearance surface 15 preferably forms main cutting edge 19 by unshowned reinforcement inclined-plane.Intersection line between first surface 17 and chip pocket 18 has formed auxiliary main cutting edge 20.As selectable scheme, described chip pocket goes for a kind of cutter hub with straight chip flute.The maximum gauge of cutter head equals the radially radial distance between the end points of assisted machining sword 20.The height of cutter head is substantially equal to described diameter.The maximum gauge of bearing-surface 22 is preferably less than the maximum gauge of cutter head, so that can realize chip removal in machined.Cinder hole 23 is roughly parallel to central axial line CL from bearing-surface 22 beginnings through cutter head and extends, and ends at corresponding top clearance surface 15.Cinder hole each side of central axial line all with central axial line CL square crossing.
Bearing-surface 22 has circular basic shape and comprises two slot part 22A, 22B.Each slot part has all covered whole bearing-surface 22 basically and has comprised a plurality of independent of each other, identical chip areas.These grooves in slot part have two principal directions that are perpendicular to one another.Basically at two slot part 22A, each groove among the 22B all intersects at the cover of two positions and clamper.Each groove all is longilineal and section is V-arrangement roughly.Each groove all has two sides, and these sides are connected to the bottom by transition region steep or arc.Described side forms acute angle each other.This angular range is 40 °-80 °, is preferably 55 °-60 °.Each side is preferably plane, and is connected on the relevant side in the obtuse angle transition region inboard, that the gradient is less or steeper by one.The quantity of groove depends on the front surface that how to form clamper in each slot part, and the range of choice of the quantity of groove is 5-20.Slot part 22A, the structure of 22B should be able to provide much larger than its particular surface when the plane.Slot part 22A, 22B occupies at least 80% on bearing-surface 22, be preferably the used district of 90-100%.Cutter head has a blind hole, and this blind hole has the internal thread 25 that combines with the screw thread free end of handle bar 11.Therefore, can provide the cutting edge of pivot center towards boring.In the embodiment shown in Fig. 4, slot part 22A, 22B forms by direct pressurization and sintering or by grinding.
Cutter hub is provided with chip pocket 18a, its spiral path along distance central axial line CL certain distance, is provided with according to the protrusion blade of drilling tool.Chip pocket can extend along whole cutter hub or along the part of cutter hub.In addition, chip pocket can be straight.
Cutter hub 12 is provided with a front surface 14 in the end towards cutter head 10, this surface is resisted against on the bearing-surface 22 of cutter head 10.The maximum gauge of described front surface is less than the maximum gauge of cutter head, but preferably equals the minimum diameter of cutter head.Cutter hub has scarfing cinder groove 23A.Cutter hub 12 can be by steel, and carbide alloy or high-speed steel are made.Free end of cutter hub 12 or afterbody often are fixed in the rotatable axle (not shown) in the drilling tool, and another relative free end face then comprises a front surface 14 and a hole 15A.The free end of handle bar stretches out through hole 15A.Front surface 14 has circular basic configuration, and comprises two slot part 16A, 16B.Each slot part has all occupied roughly half front surface 14, and comprises a plurality of independently of one another, identical grooves.Groove in slot part has two principal direction S1 that are perpendicular to one another, S2.Auxiliary slot part 16A is in abutting connection with the first slot part 16B.In fact, each groove in the first slot part 16B all intersects at the cover of two positions and clamper, and simultaneously, each groove in auxiliary slot part 16A intersects at the cover of a position and clamper in fact.Each groove all is longilineal and section is V-arrangement roughly.Each groove all has two sides, and these two sides are connected to the bottom by steep or arc-shaped transition district, and width is W.Described side forms acute angle each other.This angular range is 40 °-80 °, is preferably 55 °-60 °.Each surface is preferably planar shaped and is connected on the relevant side in the obtuse angle transition region inboard, that the gradient is less or steeper by one.The quantity of groove depends on the bearing-surface that how to form cutter head in each slot part, and the range of choice of the quantity of groove is 5-20.On the other hand, described bottom can have the radius of about 0.2-0.4mm.Slot part 16A, the structure of 16B can provide much larger than its particular surface when the plane.Slot part 16A, 16B have occupied in the front surface 14 can use at least 80% of district, is preferably 90-100%.
In the embodiment shown in fig. 9, the first slot part 16b makes by hobbing or grinding, and feeding direction is parallel with direction S2.Secondly, auxiliary slot part 16A is by identical cutter, makes with the direction parallel with direction S1.In order in each groove of auxiliary slot part 16A, to obtain enough degree of depth, cutter can be sent in the first slot part 16B slightly.Subsequently, described cutter is also processed the material of the first slot part 16B, and for example as shown in Figure 9, wherein, the end of the auxiliary slot part 16A in the first slot part 16B forms pyramid projection wholly or in part.In an illustrated embodiment, the area of auxiliary slot part 16A should be slightly larger than the area of the first slot part 16B.When mounted, the cooperation of the groove of slot part in cutter hub and the cutter head is answered so that scarfing cinder groove and chip pocket are aligned with each other in corresponding part.
The installation of cutter head 10 on cutter hub 12 should be carried out as follows.Make the handle bar enter in the boring of afterbody and, stretch out from the central authorities of front surface 14 until the front portion of handle bar by cutter hub 12.Subsequently, insert spring 51 and inwardly be screwed into limit screw 52.Because the user only needs to change cutter head usually, therefore, describedly be installed as disposable operation.Then, the screw thread end face is entered in the groove 25, afterwards rotation blade and it is screwed onto on the handle bar.Afterwards, the bearing-surface 22 of cutter head is contacted with front surface 14, so that the groove of slot part and scarfing cinder groove and chip pocket are aligned with each other in cutter hub 12 and cutter head 10.By rotation lock screw 50 cutter head 10 is resisted against on the front surface securely, promptly realizes the position among Fig. 1.At this moment, cutter head 10 is fixed on the cutter hub 12 with satisfactory way.Handle bar in this position is used in fact at cutter clamping cutter head when machined holes is withdrawn, and edge and groove can be received in power and the moment that produces when smear metal is discharged simultaneously.But the size of the power that produces from the handle bar should be enough to avoid the tie point generation gap between cutter head and cutter hub when withdrawal.
In this connection, it should be noted, being threaded between cutter head and handle bar has two purposes, that is: when mounted, the fixed position that cutter head 10 is positioned on the cutter hub is located, and when the concrete use of bite, can guarantee all the time cutter head 10 is fixed on its place, fixed position.
In the time must changing cutter head 10, adopt the process opposite, thereby can pull down and change cutter head 10 from cutter hub 12 with above-mentioned steps.
The present invention also is applicable to milling cutter.Al for example 2O 3, TiN and/or TiCN layer preferably are coated on the cutter head.In some cases, can find that the hard material of soldering as CBN or PCD so also can be obtained good effect on cutting edge.Equally, except a central handle bar, can use other clamping device; For example, can by as in U.S. Patent No. 5,988,953 or come the clamping cutter head in the bayonet coupling shown in Figure 15.
In addition, should be noted also that the foregoing description relates to respect to rotating cutter of the central axial line of cutter longitudinal axis or workpiece and the clamping device that rotates with described cutter.Described embodiment is also fixed, but can combine with a rotational workpieces subsequently.
So far, the present invention has in fact disclosed the prior art of describing as in WO 9900208 A1.According to the present invention, the new feature of described cutter and cutter head is, a kind of rigid blade arbor that is preferably used in boring or milling is provided, in this case, compare with each inner radial 40-40 of cutter head, each the radially outer 41-41 that bears the cutter head of higher relatively cutting speed has better wear resistance.Simultaneously, blind hole 25 is made by the carbide alloy with high tenacity, and it can bear higher stress, referring to Fig. 5-7.This point be by under high pressure and about 180 ℃ uniform temperature, utilize first mixture 62 to insert first mould 60 that is used for injection moulding and realize through entering the mouth.Described mould comprises one first cylindrical or oval-shaped cavity or groove, and it is respectively applied for the cutter head with Fig. 5 and outer shape shown in Figure 6; And external screw thread core body 65 that is positioned at central authorities.With reference to accompanying drawing 11-13 described method is illustrated in greater detail.Wherein, shown according to the cutter head 41 among of the present invention, Fig. 7 " another kind of alternate embodiments.In this embodiment, in according to the bottom view shown in the figure youngster, the contour shape of described inner chamber has the outer shape of peanut or hourglass, to form a core body 61 that surrounds cinder hole 23 and blind hole 25.Described mould 60 comprises an external screw thread gland 65 that forms tapped blind hole 25.When during the phase I of injection moulding processing, when gland and tapered slightly core bar 66 are surrounded by liquid mixture, described cinder hole and blind hole have been formed.Described mixture comprises hard metal powders and the binding agent that has than high cobalt content, plastics for example, and it is mixed and form bead or grain shape.Formed a core body 61 thus with cinder hole 23 and internal thread 25.Subsequently, after cooling, surround, referring to Figure 13 and 14, preferably by utilizing new clamping plate to replace carrying out at two first clamping plate that injection is for the first time used by one in Figure 13 and 14 second mould 63 that is used for injection moulding.Second mould 63 comprises the part that is used to form chip pocket and the other parts of cutter head.In the injection period second time, taper core bar 66 is used for fixing insert.As a result, core body 61 is fixed on the central authorities of second mould.Afterwards, through entering the mouth 64 with second kind of mixture, 67 injections, second mould.The content that second kind of mixture 67 and first kind of topmost difference of mixture are cobalt in second kind of mixture is less.The difference of metal adhesive is the scope of 1-10 components in weight percent.Herein, should understand term " cobalt " and be a kind of like this metal adhesive, this binding agent can be changed or be comprised other metal, for example nickel in addition.In addition,, only change over the clevis plate, just can use existing machine by from injecting for the first time.Because core bar can be used in combination with core body 61 and can position core bar during processing subsequently, therefore, can provide desirable manufacture method.In the position of Figure 14, need not screw thread gland 65.After second step of injection mo(u)lding, obtained a blank that is used for cutter head, after supercooling, this blank defines interior section 40 after sintering ", second kind of mixture 67 constituted exterior section 41 simultaneously ".At first remove plastic binder from shaped portion, the moulded product to gained carries out sintering subsequently.The downside of processing cutter head, thus the downside of cutter head can obtain above-mentioned cellular figure 22.
In addition, by this method, can not be subjected to the restriction of traditional shaping pressure method to select the shape of cutter head.For example, can on the surface that only can be placed on the ground so far, form chip breaker.
But Figure 15 has shown the another kind selection scheme of drilling tool among the present invention.Described drilling tool has drill body 12 ' and drill bit 10 .Described drill body and drill bit are connected with each other by a kind of known bayonet coupling.Because interior section 40 of cutter head 10 have one and define sharper keen recessed bight, therefore, interior section 40 should make by having more the Hardmetal materials of high tenacity.In Figure 15, described have more that the material of high tenacity is denoted as grey.Have more above-mentioned that the outside of the Hardmetal materials of high tenacity radially is provided with more wear-resisting Hardmetal materials 41 , described cutter head 10 can be provided with the scarfing cinder groove.Be very similar to the section among Fig. 6 though should be understood that the section of the drilling tool in Figure 15.But it also can be made as Fig. 5 or 7.
Therefore, cutter head comprises at least two kinds of hard metal characteristics, and a kind of is to have characteristic tough and tensile but that wearability is lower in interior section 40-40 , and a kind of is that externally part 41-41 has more crisp, more wear-resisting characteristic.Cutter head is made by injection moulding, and at least two kinds of metallic characters have identical shrinkage factor, therefore, has eliminated the shrinkage cavity of breaking or existing in inside that externally exists that can be shaped and be produced by conventional press.In four kinds of alternate embodiments, provided cutter head, wherein two kinds (Fig. 5 and 6) have an inner core body, this core body is surrounded by described exterior section except sending into direction and retracted orientation fully, and two kinds (Fig. 6 and 15) have a middle body that runs through, and this part is not surrounded fully by described exterior section.The difference of cobalt content is the percentage by weight of 1-1 0% between interior section and exterior section.Wherein, described interior section is that the material of the cobalt of 6-20% is made by containing percentage by weight, and the material in the described exterior section contains the cobalt that percentage by weight is 5-15%.In two embodiment, interior section 40,40 " can not arrive cinder hole 23.The 4th embodiment (accompanying drawing 15) do not disclose the scarfing cinder groove at all.The middle body of cutter head is to be had more the carbide alloy of high tenacity and made by a kind of, so that its screw thread 25/ projection 25 ' will be born bigger stress, so that the cutting front end 21 as chisel edge 24 will bear lower cutting speed.
In any case the present invention also should not be limited to can improve arbitrarily the present invention within the scope of the appended claims on the contrary among the embodiment of above disclosure.

Claims (10)

1. be used for being rotated the cutter of cutting with respect to workpiece, it comprises: a cutter hub (12), a cutter head (10-10 ) and fastener, described cutter hub with front surface (14) is adjacent to each other separably with the described cutter head with bearing-surface (22), described cutter hub has a handle bar part, described cutter head is made by the injection moulding carbide alloy and is comprised at least one cutting edge (19) and one hole (25) or the projection (25 ') in order to cooperate with fastener, (10-10 ) is integrally formed for described hole/projection and cutting edge and cutter head, it is characterized in that: hole (25) or projection (25 ') to small part are formed in the whole interior part (40-40 ) of cutter head, and make by have more the material of high tenacity than the material of making remainder (41-41 ) in the cutter head.
2. cutter according to claim 1 is characterized in that: described hole (25) are central blind hole, and comprise internal thread, or projection (25 ') formed the part bayonet coupling, and the middle body of cutting edge (19) is had more the material of high tenacity and made by described.
3. cutter according to claim 2 is characterized in that: described have the more material encirclement blind hole (25) of high tenacity, and extend to and the substantially parallel bearing-surface (22) of the central axial line (CL) of cutter head from a front end (21) of cutter head.
4. cutter according to claim 1 is characterized in that: cutter head (10; 10 ) has inner body core body (40; 40 ), described whole core body is except along sending into direction and the withdrawal below fully by described exterior section (41; 41 ") surround.
5. cutter according to claim 1, it is characterized in that: described cutter head (10 ') has the oval middle body (40 ') of a perforation, this middle body (40 ') is partly surrounded by middle body (41 "); or cutter head (10 ") has the middle body (40 ") of a perforation, and this middle body (40 ") has surrounded cinder hole (23) and centre bore (25).
6. the cutter head that is used for rotary cutting, this cutter head (10-10 ) has circular basic shape and has at least one cutting edge (19), (10-10 ) is integrally formed for this cutting edge and cutter head, described cutter head is provided with a bearing-surface (22) in the end away from cutting edge, described cutter head is made by the injection moulding carbide alloy and is comprised one in order to the hole (25) that cooperates with fastener or projection (25 '), described hole/projection and described cutting edge and cutter head are integrally formed, it is characterized in that: hole (25) or projection (25 ') to small part are formed in the whole interior part (40-40 ) of cutter head, and the material of high tenacity forms by having more than the material of making remainder (41-41 ) in the cutter head.
7. cutter according to claim 6 is characterized in that: described hole (25) are central blind hole, and comprise internal thread, or projection (25 ') forms the part bayonet coupling, and the middle body of cutting edge (19) is had more the material of high tenacity and made by described.
8. cutter according to claim 7 is characterized in that: described have more that the material of high tenacity has surrounded blind hole (25), and extend to and the substantially parallel bearing-surface (22) of the central axial line (CL) of cutter head from a front end (21) of cutter head.
9. cutter according to claim 6 is characterized in that: cutter head (10-10 ) has inner body core body (40-40 ), and described whole core body is complete in or local described exterior section (41; 41 ") surround, or described cutter head (10 ") has the middle body (40 ") of a perforation, this middle body has surrounded cinder hole (23) and medium pore (25).
10. be used to make the method for rotary cutting cutter head, this cutter head (10-10 ) has circular basic shape and has at least one cutting edge, and one in order to be used for hole (25) or the projection (25 ') that fastening device cooperates, (10-10 ) is integrally formed for described hole/projection and cutting edge and cutter head, it is characterized in that: described cemented carbide powder has the metal adhesive of first content, and mix with a kind of plastic binder, afterwards mixture is injected a mould machine and be heated to suitable temperature, to inject at the mixture under high pressure and a certain temperature in first mould (60) then, this mould comprises first groove (23,25) and one be used for being shaped and have at least one hole (23, the gland (65) of core body 25) (61), afterwards, mixture solidifies in first mould, described subsequently hole (61) in mould machine by the hole (23 in second mould (63), 25) surround and by described hole (23,25) in mould machine, be positioned in second mould (63), injection comprises second mixture of metal adhesive with less second content and plastic binder and is heated to suitable temperature, described second mould (63) comprises at least one cutting edge of direct or indirect formation, at least one clearance surface, a bearing-surface and one or more core bodys part, to be used to the described cutter head that is shaped, afterwards, described mixture solidifies in mould, subsequently cutter head is extracted from described mould and it is carried out sintering, thereby this cutter head can carry out the fine finishining as grinding.
CNB008142270A 1999-10-14 2000-10-11 Tool for rotary chip removal, tool tip and method for manufacturing tool tip Expired - Fee Related CN1315608C (en)

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US6551035B1 (en) 2003-04-22
EP1222047B1 (en) 2004-08-04
WO2001026856A1 (en) 2001-04-19
KR20020043227A (en) 2002-06-08
EP1222047A1 (en) 2002-07-17
CN1315608C (en) 2007-05-16
JP2003511253A (en) 2003-03-25
US20030118413A1 (en) 2003-06-26
SE9903685D0 (en) 1999-10-14
EP1452257A2 (en) 2004-09-01
SE9903685L (en) 2001-04-15
DE60012766D1 (en) 2004-09-09
KR100646686B1 (en) 2006-11-17
DE60012766T2 (en) 2005-01-13
US6716388B2 (en) 2004-04-06
EP1452257A3 (en) 2004-11-24

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